The KILONGA program started in the Amoron’i Mania region of Madagascar in 2021 and sheds light on how menstrual stigma can affect girls’ daily experiences at school. In many communities in this region, menstruation remains a taboo subject, something that is rarely discussed openly. Before the project started, 39 percent of the girls surveyed believed menstruation should not be discussed openly, contributing to widespread gaps in girls’ understanding of menstruation, its management and their menstrual health. They may feel embarrassed, isolated, or anxious when they begin menstruating, particularly at school where such stigma can sometimes create a stressful learning environment for girls. The KILONGA program was designed around an important insight: menstrual stigma is a shared social norm, not a problem any girl can solve on her own. So, rather than targeting girls in isolation, the program engaged the entire school community. Teachers were trained to deliver menstrual hygiene education; WASH (water, sanitation, and hygiene) committees involving parents were created; sanitation facilities were improved; local seamstresses were mobilized to produce reusable sanitary pads, and girls received vouchers to acquire the pads. It also has a peer-to-peer sensitization component, through an innovative “Young Girl Leaders” approach that drew on the idea of positive deviance: that change often spreads through individuals who challenge harmful social norms. The evaluation found that the program's reach went beyond attitudes. Results show that girls' education outcomes improved, with grade progression rates rising from 51 to sixty percent, as did their well-being, with lower stress and greater social cohesion at school. In other words, reducing menstrual stigma was not a peripheral addition to academic programming; it was part of what helped girls learn. These findings reinforce a broader lesson, that the psychosocial environment in schools matters for learning, and addressing menstrual stigma is one practical way to improve girls' education.